Tube-expander.



. G. WIEDEKE, SB.

TUBE EXPANDER.

APPLICATION 11mm MAY 10, 1909.

Patented Aug. 10, 1909.

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' tube expander UNITED srntpns PATENT ()FFICE.

GUSTAV WIEDEKE, SR1, OF DAYTON, OHIO, ASSIGNOR TO GUSTAV WIEDEKE & COMPANY,

OF DAYTON, OHIO, A FIRM.

TUBE-EXPANDER.

No. 930,821. Patented Aug. 10, 1909.

Original application filed. March 6, 1909, Serial No. 481,799. Divided and this application filed May 10, 1909. Serial No. 495,090.

Specification of Letters Patent.

To all whom it may concern:

Be it known that I, GUSTAV WIEDEKE, Sr., a citizen of the United States, residing at Dayton, in the county of Montgomery and State of Ohio, have invented certain new and useful Improvements in Tube-Expanders; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the characters of reference marked thereon, which form a parof this specification.

This invention relates to new improvements in tube expanders.

The present a plication is divided from my pending app ication Serial No. 481,799, filed March 6, 1909.

In the process of using. these implements, much handling or manipulation of the same is incidental thereto, and the guard being an independent part of the implement, it is desirable that the same shall not become detached from the implement, but shall be a permanent part thereof.

It is therefore, the object of the present invention to provide simple and efficient means for maintaining the guard upon the implement at all times without employing a greater number of parts than is desirable, as hereinafter described and claimed. 7

Preceding a detail description of the invention, reference is made to the accompanying drawings, of which- Figure 1, is a longitudinal elevation of a having my guard-retaining means applied thereto; a portion of the guard is broken away. Fig. 2, is a similar view with the mandrel removed. Fig. 3, is a view of the retaining-ring removed. Fig. 4, is a section on the line a a of Fig. 1.

In a detail description of the invention, similar reference characters indicate corresponding arts. 1

The rol er cage 1 is provided with a suitable number of openings 5 which extend from the longitudinal central boreto the periphery thereof and in which are placed aseries of expanding rollers 6. Integral with the roller and which is occupied by the guard '7. In Fig. 2, the peripheral groove 8 is smaller and does not extend to the flange 2. On opposite sides of the guard are lateral extensions or abutments 4 which rest against the tube sheet or head (not shown) when the implement is placed in an operative pbosition, 111 which position the ends of the tu es project between said extensions 4 and the cage into the space 12 which surrounds the cage. The tubes have not been illustrated as the operations of tube expanders thereon are Well understood.

Lying within the annular peripheral groove in front of the guard, is a resilient ring or band 10 which maintains the uard in osition betweensaidband and the ange 2. his annular band is itself maintained in position by the annular shoulder formed on the cage by the groove 3, and by the guard so that while the band itself prevents the guard from slip ing off the cage or implement, the band is a so maintained in position owing to its resiliency and to the annular shoulder on the roller cage before referred to.

Should it be desirable to reverse the position of the guard, this may be done easily by removing the band 10 which is done by expanding the same and slipping it over the cage. The usual tapered mandrel 9 is a wellknown feature of tube expanders, the same being provided with a handle 13 by means 0 which the tapered body of the mandrel is forced into the cage to expand the rollers 5.

I claim as my invention:

In a tube expander, a roller cage having an integral flange at one end and an annular recess in the periphery of said cage which lies between the roller openings in said cage and said integral flange, a guard mounted upon said cage and abutting on one side with said integral flange, and an annular resilient band lying within the peripheral recess of the cage and adapted to maintain the guard in position upon the cage, saidannular band engagifpg the side of the guard opposite the mtegral ange.

In testimony whereof I affix my signature, in presence of two witnesses.

GUSTAV WIEDEKE, SR.

and useful cage 1, is an end flange 2 and between said end Witnesses: flange and the cage or body of the implement MATTHEW SIEBLER, is an annularperipheral groove 3 as in Fig. 1 R. J. MCCARTY. 

